postgres indexes in join tables

[apassi]

Hi,

I found major issue with postgres dialect. It seems to create multiple indexes for many-to-many relations.

There has been same kind issue 24, but this is only for relations.

Table "public.company_files"
Column | Type | Modifiers
------------+---------+-----------
company_id | integer |
files_id | integer |
Indexes:
"company_files_company_id_files_id_idx" btree (company_id, files_id)
"company_files_company_id_files_id_idx1" btree (company_id, files_id)
"company_files_company_id_files_id_idx2" btree (company_id, files_id)
"company_files_files_id_company_id_idx" btree (files_id, company_id)
"company_files_files_id_company_id_idx1" btree (files_id, company_id)
"company_files_files_id_company_id_idx2" btree (files_id, company_id)
....

currently i seems to have ~2500 index per join table in my DB. My ORM version is 2.1.0

[dresende]

We use IF NOT EXISTS to avoid creating if it's already there. Perhaps the indexes are not using it and postgres is append the number in the end (1, 2, ..) and accepting it.